Hydrogenation method for ethylene tar

A technology for ethylene tar and hydrocracking, which is used in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of not being effectively treated and unable to treat ethylene tar fraction, etc., and achieve the effect of increasing added value

Active Publication Date: 2011-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only utilizes the light fraction which accounts for a small proportion in ethylene tar, and more than 80% of the ethylene tar fraction has not been effectively treated; at the same time, the hydrorefining conditions it provides cannot handle ethylene with a boiling point higher than 280 ° C. tar fraction

Method used

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  • Hydrogenation method for ethylene tar
  • Hydrogenation method for ethylene tar
  • Hydrogenation method for ethylene tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0054] The properties of the light and heavy fractions of ethylene tar used are shown in Table 2 and Table 4. Example The ethylene tar light fraction is treated by a series process. Two reactors are used. The first reactor is equipped with a hydrogenation protection agent FZC-103 and a hydrofining catalyst 3936, and the upper part of the second reactor is filled with a hydrogenation carbon removal catalyst HDC. -3. The first hydrocracking catalyst loaded in the middle is a hydrocracking catalyst containing amorphous silica-alumina and Y molecular sieve, and the second hydrocracking catalyst loaded in the lower part is a hydrocracking catalyst containing amorphous silica-alumina and β molecular sieve . In the embodiment, the volume ratio of FZC-103:3936:HDC-3:first hydrocracking catalyst:second hydrocracking catalyst is as follows: 12:23:23:21:21. The results of the reaction are shown in Table 3. In addition, the device has been tested for 5,000 hours, and the results show th...

Embodiment 4

[0062] The heavy fraction of ethylene tar (see Table 4 for properties) passes through the hydrogenation protection catalyst, the hydrogenation deresidue catalyst and the hydrogenation conversion catalyst in sequence, and its volume ratio is 8:55:37, wherein the hydrogenation protection catalyst used is FZC-100 and FZC-102B, its volume ratio is 1: 2, the hydrogenation conversion catalyst such as the catalyst obtained in CN02109422.5 Example 1 is recorded as ZH1, and its properties are shown in Table 5.

[0063] Table 5 Composition and properties of hydroconversion catalysts

[0064]

[0065] The loading volume ratio of the used hydrodecarbonization catalyst HDC-1 and HDC-2 is 4:6. The loading order of the hydrogenation catalyst for the heavy fraction of ethylene tar is as follows: FZC-100, FZC-102B, HDC-1, HDC-2, ZH1. In this example, the process conditions for the hydrogenation of heavy fractions are as follows: the reaction pressure is 16MPa, the reaction temperatu...

Embodiment 5

[0067] Compared with Example 4, the loading volume ratio of the hydrodecarbonization catalysts HDC-1 and HDC-2 used was changed to 5:5, and the rest were the same as Example 4.

[0068] Table 6 Heavy fraction hydrogenation results

[0069]

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Abstract

The invention discloses a hydrogenation method for ethylene tar, which comprises the following steps of: performing fractional distillation on the ethylene tar by selecting a proper cutting point to obtain light and heavy fractions; making the light fraction contact a hydrogenation protecting catalyst, a hydrogenation refining catalyst, a hydrogenation carbon residue removing catalyst and a hydrocracking catalyst in turn, and reacting to obtain hydrocracking generated oil, wherein partial hydrocracking generated oil is circulated and mixed with the light fraction of the ethylene tar to enter a hydrogenation reaction area, and the rest hydrocracking generated oil is separated to form gasoline and diesel fractions; and making the heavy fraction contact a hydrogenation protecting catalyst, a hydrogenation carbon residue removing catalyst and a hydro-conversion catalyst preferably in turn, and separating to obtain gasoline and diesel fractions. In the method, according to composition characteristics of the light and heavy fractions of the ethylene tar, different hydrotreating schemes are selected, so that the ethylene tar is converted into fuel oil to the greatest extent, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, the running period of the device is prolonged, full fractions of the ethylene tar are fully utilized and the added value of the ethylene tar is improved.

Description

technical field [0001] The invention relates to a method for hydrogenation of ethylene tar. Background technique [0002] The increasing shortage of world oil resources and the increasing price make it necessary for refineries to reduce emissions and increase efficiency. Ethylene tar is currently mainly sold as heavy fuel oil or carbon black raw materials, with low added value. [0003] Ethylene tar is a high-temperature condensation product of raw materials and products in the steam cracking process of ethylene cracking raw materials. Its initial boiling point is 170-260°C, and its final boiling point is >600°C, generally 600-700°C. It belongs to the heavy fraction range. Ethylene tar is mainly a mixture of double-ring and above condensed-ring aromatics, the content of aromatics is more than 90%, and the density (20°C) is greater than 1.0g / cm 3 , Low content of impurities such as sulfur and nitrogen, basically no metal impurities. [0004] In order to improve economic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 许杰关明华
Owner CHINA PETROLEUM & CHEM CORP
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